I have the bits and pieces. I have the help of this forum.

Now I gotta settle my brain on a design and get to it.

I am imagining the autonomous racer going out into the lobby through one door and returning through the only other door.

Two choices come to my mind.

1. Place a light bulb on the floor at the entrance door. Have the PIC driven car find the light source and follow its beam.

2. Make sure all the doors in the lobby are closed. Have the PIC driven car follow the wall around the room until it finds the second open door.

What do you all think? Got some better ideas?

Thanks

Ken